There seems to be a problem with the knife animations you wanted. I've been testing out a dummy compile for the weapon on your selected animations, but those animations are buggy as hell. I've tried tweaking the draw animation to work properly, but I've already maxed out the FPS range and it's still buggy (snaps to idle mid-animation, and looks really strange when sped up). The stab-miss animation is also bugged, as the arm looks broken when going back to idle and then it suddenly snaps into a different position after the stab-miss animation ends. You may want to find another set of animations. :/
Exhausted...